Numbness: Only the outer edge of my right big toe.

I should be in a podiatrist's office right now asking this question, but as a precaution I felt safe confiding in you Dr. Abrams for professional advice. Although to me this problem seems minor, my biggest concern is whether or not the problem will persist or worsen. Approximately three weeks ago, the outer edge of the of my big toe suddenly became numb one day (I had not injured it in any way, the toe itself has no marks, and I do not experience pain). It has not spread thus far, nor has it gone away. I was wondering if this problem can be easily examined and pinpointed, or do you think that I may need several tests or more? It's a very small area of my toe.

This slip-on device is a soft and stretchable Nylon/Lycra® fabric molded with a proprietary gel pad to protect the entire Achilles tendon of the foot by absorbing pressure and friction resulted from rubbing with the surface of the shoe.